Content evaluation system and content evaluation method using the system

ABSTRACT

A reliable content evaluation method and system are disclosed. The system includes a brainwave detector, a bio signal detector, a first controller, and a second controller. The brainwave detector detects a brainwave signal of a subject provided with content and outputs a result. The bio signal detector detects bio signals of the subject and outputs a result. The first controller can modify the brainwave and the bio signals to a signal level available for the second controller. The second controller detects change of the brainwave signal and the bio signal through an analysis of the brain wave signal and the bio signal from the first controller. Then, the second controller determines at least one of a degree of engagement and an emotional reaction of the subject to the content, using changes in the brainwave signal and the bio signal, and evaluates the content using the determined results.

CROSS REFERENCE TO RELATED APPLICATION

This application claims priority from and the benefit of Korean PatentApplication No. 10-2013-0110301, filed on Sep. 13, 2013, which is herebyincorporated by reference for all purposes as if fully set forth herein.

BACKGROUND

Field

Exemplary embodiments of the present disclosure relate to a contentevaluation system to evaluate content such as games, movies,advertisements, and music, and a content evaluation method using thesystem.

Discussion of the Background

In recent years, researchers have studied the economic impact of contentgenerated and provided through various means (e.g., Internet, cameras,television, advertisements, etc.). Certain factors, such as theeconomics (e.g., revenue generated by the provided content) or strategyto deploy the content (e.g., timing of deployment) are being assessed ingreater detail.

Generally, assessment of content is done by people who have beenprovided with the content via a survey. Content assessment via a surveyis generally done after development of the contents. However, surveyresults are very subjective, inconsistent, and unreliable because thesurvey results may depend on the emotional state or memories of thepeople surveyed.

Accordingly, a more objective and reliable content evaluation method isneeded.

The above information disclosed in this Background section is providedto enhance understanding of the background of the disclosed subjectmatter and therefore may contain information that does not form any partof the prior art nor what the prior art may suggest to a person ofordinary skill in the art.

SUMMARY

Exemplary embodiments of the present disclosure provide a contentevaluation method and system.

Additional features of the present disclosure will be set forth in thedescription which follows, and in part will be apparent from thedescription, or may be learned by practice of the disclosed subjectmatter.

Exemplary embodiments of the present disclosure disclose a contentevaluation system including a brainwave detector, a bio signal detector,and a controller. The brainwave detector detects a brainwave signal of asubject provided with content. The bio signal detector detects a biosignal of the subject provided with the content. The controller receivesthe brainwave signal from the brainwave detector and the bio signal fromthe bio signal detector. The controller determines a change in thebrainwave signal and a change in the bio signal. Then, the controllerdetermines a degree of engagement and an emotional reaction of thesubject to the content using the change of the brainwave signal and thechange of the bio signal, and evaluates the content using at least oneof the degree of the engagement and the emotional reaction.

Exemplary embodiments of the present disclosure disclose a method ofevaluating content. The method includes detecting a brainwave signal ofa subject provided with the content, detecting a bio signal of thesubject, detecting a change of the brainwave signal, detecting a changeof the bio signal, determining a degree of engagement and an emotionalreaction of the subject to the content using the change in the brainwavesignal and the change in the bio signal, and evaluating the contentusing at least one of the degree of engagement and the emotionalreaction.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary and explanatory and areintended to provide further explanation of the disclosed subject matteras claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the disclosed subject matter and are incorporated inand constitute a part of this specification, illustrate embodiments ofthe disclosed subject matter, and together with the description serve toexplain the principles of the disclosed subject matter.

FIG. 1 is a block diagram showing a content evaluation system accordingto exemplary embodiments of the present disclosure.

FIG. 2 is a block diagram illustrating a brainwave detector of thecontent evaluation system according to exemplary embodiments of thepresent disclosure.

FIG. 3 is a drawing illustrating a brainwave cap of the brainwavedetector worn on a head of a subject according to exemplary embodimentsof the present disclosure.

FIG. 4 is a block diagram illustrating a bio signal detector of thecontent evaluation system according to exemplary embodiments of thepresent disclosure.

FIG. 5 is a drawing illustrating the Galvanic skin response sensor, theheart rate sensor, and the body temperature sensor attached to fingersof the subject, according to exemplary embodiments of the presentdisclosure.

FIG. 6 is a drawing illustrating a respiration sensor of the bio signaldetector attached to the subject, according to exemplary embodiments ofthe present disclosure.

FIG. 7 illustrates the location of facial electromyogram sensors on aface of the subject, according to exemplary embodiments of the presentdisclosure.

FIG. 8 is a flow chart illustrating a content evaluation methodaccording to exemplary embodiments of the present disclosure.

DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS

Exemplary embodiments of the disclosed subject matter are described morefully hereinafter with reference to the accompanying drawings. Thedisclosed subject matter may, however, be embodied in many differentforms and should not be construed as limited to the exemplaryembodiments set forth herein. Rather, the exemplary embodiments areprovided so that this disclosure is thorough and complete, and willconvey the scope of the disclosed subject matter to those skilled in theart. In the drawings, the size and relative sizes of layers and regionsmay be exaggerated for clarity. Like reference numerals in the drawingsdenote like elements.

It will be understood that when an element or layer is referred to asbeing “on,” “connected to,” or “coupled to” another element or layer, itcan be directly on, connected, or coupled to the other element or layeror intervening elements or layers may be present. In contrast, when anelement is referred to as being “directly on,” “directly connected to,”or “directly coupled to” another element or layer, there are nointervening elements or layers present. As used herein, the term“and/or” includes any and all combinations of one or more of theassociated listed items. It may also be understood that for the purposesof this disclosure, “at least one of X, Y, and Z” can be construed as Xonly, Y only, Z only, or any combination of two or more items X, Y, andZ (e.g., XYZ, XYY, YZ, ZZ).

It will be understood that, although the terms first, second, and third,etc. may be used herein to describe various elements, components,regions, layers, and/or sections, these elements, components, regions,layers and/or sections should not be limited by these terms. These termsare only used to distinguish one element, component, region, layer orsection from another region, layer or section. Thus, a first element,component, region, layer, or section discussed below could be termed asecond element, component, region, layer or section without departingfrom the teachings of the disclosed subject matter.

Spatially relative terms, such as “beneath,” “below,” “lower,” “above,”“upper,” and the like, may be used herein for ease of description todescribe one element or feature's relationship to another element(s) orfeature(s) as illustrated in the figures. It will be understood that thespatially relative terms are intended to encompass differentorientations of the device in use or operation in addition to theorientation depicted in the figures. For example, if the device in thefigures is turned over, elements described as “below” or “beneath” otherelements or features would then be oriented “above” the other elementsor features. Thus, the exemplary term “below” can encompass both anorientation of above and below. The device may be otherwise oriented(rotated 90 degrees or at other orientations) and the spatially relativedescriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particularexample embodiments only and is not intended to be limiting of thedisclosed subject matter. As used herein, the singular forms “a,” “an,”and “the” are intended to include the plural forms as well, unless thecontext clearly indicates otherwise. It will be further understood thatthe terms “comprises” and/or “comprising,” when used in thisspecification, specify the presence of stated features, integers, steps,operations, elements, and/or components, but do not preclude thepresence or addition of one or more other features, integers, steps,operations, elements, components, and/or groups thereof.

Example embodiments of the disclosed subject matter are described hereinwith reference to cross-sectional illustrations that are schematicillustrations of idealized example embodiments (and intermediatestructures) of the disclosed subject matter. As such, variations fromthe shapes of the illustrations as a result, for example, ofmanufacturing techniques and/or tolerances, are to be expected. Thus,example embodiments of the disclosed subject matter should not beconstrued as limited to the particular shapes of regions illustratedherein but are to include deviations in shapes that result, for example,from manufacturing. For example, an implanted region illustrated as arectangle will, typically, have rounded or curved features and/or agradient of implant concentration at its edges rather than a binarychange or transition from implanted to non-implanted region. Likewise, aburied region formed by implantation may result in some implantation inthe region between the buried region and the surface through which theimplantation takes place. Thus, the regions illustrated in the figuresare schematic in nature and their shapes are not intended to illustratethe actual shape of a region of a device and are not intended to limitthe scope of the disclosed subject matter.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which this disclosed subject matterbelongs. It will be further understood that terms, such as those definedin commonly used dictionaries, should be interpreted as having a meaningthat is consistent with their meaning in the context of the relevant artand will not be interpreted in an idealized or overly formal senseunless expressly so defined herein.

Hereinafter, exemplary embodiments of the disclosed subject matter willbe described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a content evaluation system accordingto exemplary embodiments of the disclosed subject matter.

Referring to FIG. 1, a content evaluation system may evaluate contentprovided to a subject through a content device 10. The contentevaluation system may include a brainwave detector 100, a bio signaldetector 200, a first controller 300, a second controller 400, a camera500, an evaluation standard storage 600, and a display 700. The contentmay include, but is not limited to, various media content, such as amovie, music, game, advertisement, and shopping items. The contentdevice 10 can be one of various media providers including, but notlimited to, a television (TV), personal computer (PC), smart phone, andtablet. The subject may be any human being.

The brainwave detector 100 may measure the brainwave of a subject who isprovided with the content through the content device 10. The brainwavedetector 100 may then output a measured result associated with thebrainwave measurement to the first controller 300. In general, thebrainwave detector 100 may be any suitable detector capable of detectingbrainwaves.

The bio signal detector 200 may measure bio signals of the subject andmay output a measured result associated with the measured bio signal tothe first controller 300. In general, the bio signal detector 200 may beany suitable detector capable of detecting bio signals.

The first controller 300 may control the brainwave detector 100 and thebio signal detector 200, and may transmit the brainwave signal receivedfrom the brainwave detector 100 and the bio signal received from the biosignal detector 200 to the second controller 400.

In some cases, the first controller 300 can modify the brainwave signalsand the bio signals to signal levels available for the second controller400. For example, in some cases, the first controller 300 can amplify atleast one of the brainwave signals and the bio signals beforetransmitting the signals to the second controller 400. Also, the firstcontroller 300 can output the brainwave signal according to apredetermined bandwidth, for example 0.1 Hz-50 Hz, by filtering, orselectively outputting a part of the brainwave signal. Accordingly, itshould be understood that the first controller 300 may include anysuitable software and hardware, such as a processor and/or filter, forprocessing signals received from the brainwave detector 100 and the biosignal detector 200.

The second controller 400 may detect changes (e.g., transitions) inbrainwave signals and bio signals before and/or while providing thecontent through analysis of the brainwave signals and the bio signalsreceived from the first controller 300. The second controller 400 maydetermine at least one of a degree of engagement and an emotionalreaction of the subject to the content based on the changes in thebrainwave signals and the bio signals. The second controller 400 mayevaluate the content based on the determined results. It should beunderstood that the second controller 400 may include any suitablesoftware and hardware, such as a processor and/or filter, for processingsignals received from the first controller 300. In addition, althoughFIG. 1 shows the first controller 300 and the second controller 400 asbeing separate controllers, it should be understood that embodiments ofthe disclosed subject matter are not limited thereto. For example, insome cases, the first controller 300 and the second controller 400 maybe combined into one controller. In some cases, the first controller 300and the second controller 400 may be formed in more than twocontrollers.

The camera 500 may take an image of the subject and transmit the imageto the second controller 400. In general, the camera 500 may be anysuitable image acquisition device capable of obtaining an image of thesubject.

Then, the second controller 400 can evaluate the content, in part, byanalyzing a movement of the subject from the images provided by thecamera 500 and by verifying the determined results, i.e., degree ofengagement and emotional reaction, using the analyzed results.Therefore, a reliability of the evaluation of the content can beimproved using additional real time information on the subject andcomparing the determined results with movement of the subject to removeor correct any inaccuracies. For example, the images of the camera 500may be synchronized with the bio signals and/or brainwaves, and theimages of the camera 500 may be filtered to remove undesired noise, suchas, drowsiness, unconscious movements, reflex movements, and the like oftest subject, from the measured bio signals and/or brainwaves.

The evaluation data storage 600 can be any suitable storage medium,including, for example, an external storage device such as a hard diskor external memory, or an internal memory equipped in a computingdevice. The evaluation data storage 600 may store evaluation standarddata for evaluating the content, and may provide the evaluation standarddata in response to a request from the second controller 400. The secondcontroller 400 can evaluate an interest-causing level of the content byevaluating the determined results according to the evaluation standarddata provided by the evaluation data storage 600.

The evaluation standard data may be standardized data representingspecific emotional states. For example, the evaluation standard data mayrepresent a common pattern of physical reactions to a same emotionalcircumstance caused by a same object. An evaluation standard data for“fear” may be obtained by showing a scary movie to a number of subjectsand extracting a common pattern of measure signals. However, aspectsneed not be limited thereto such that the evaluation standard data maybe indicative of other emotions, such as happy, sad, anxious, nervous,angry, trust, disgust, anticipation, surprise, etc. The evaluationstandard data can be sorted and stored according to various criteriasuch as a type of content, or age or sex of the subjects. In addition,the second controller 400 can adjust the evaluation standard data as thenumber of measurements of the content increases, and may control theevaluation standard storage 600 to store the adjusted evaluationstandard data. For example, the second controller 400 can analyzeevaluation results of the content accumulated during a certain period todetermine whether to adjust the evaluation standards data; can set a newevaluation standards data; and instruct the evaluation standard storage600 to store the new evaluation standards data when adjustment of theevaluation standard data is determined to be necessary.

The display 700 is controlled by the second controller 400, and candisplay an evaluation result from the second controller 400.

FIG. 2 is a block diagram illustrating a brainwave detector 100 of thecontent evaluation system, according to exemplary embodiments of thedisclosed subject matter. FIG. 3 is a drawing illustrating a brainwavecap 110 of the brainwave detector 100 worn on a head of the subject,according to exemplary embodiments of the disclosed subject matter.

Referring to FIG. 2 and FIG. 3, the brainwave signal detected by thebrainwave detector 100 may include at least one of frontal midline thetawave and alpha wave. The frontal midline theta wave is a brainwavewithin a range of 6.5 Hz-7.5 Hz, and the alpha wave is a brainwavewithin a range of 8 Hz-12 Hz.

The brain detector 100 may include a brainwave cap 100 worn on a head ofa subject to measure and detect brainwaves, and a transceiver 120 totransmit the brainwave signal received from the brainwave cap 110 to thefirst controller 300.

The brainwave cap 110 can consist of a plurality of electrodes whichcontact various positions of the head of the subject. The electrodes maycontact a forehead of the subject and a face of the subject, includingnear (e.g., below, above, on the side of) the eyes of the subject todetect eye blinking of the subject.

The transceiver 120 may transmit brainwave signals, such as the frontalmidline theta wave and the alpha wave, and a signal corresponding to ablinking eye provided from the brainwave cap 110 to the first controller300. The brainwave signal transmitted by the transceiver 120 mayselectively include one or more types of brainwaves, e.g., frontalmidline theta wave and alpha wave.

The second controller 400 may analyze the brainwave signal. Beforeanalyzing the brainwave signal, the reliability of the analysis of thebrainwave signal may be improved by transforming the brainwave asfollows. First, noise included in the brainwave signal may be removed.Such noise canceling can be performed not only by human visualinspection but also by the first controller 300 or the second controller400 automatically. Second, the brainwave signal may be filtered so thatonly a certain bandwidth (e.g., 0.1 Hz-50 Hz) passes the filter. Third,a component related to the blinking eye can be eliminated from thebrainwave signal through an independent component analysis. Fourth, afast Fourier transformation (FFT) for the brainwave signal before andwhile the content is provided can be performed. Fifth, the frontalmidline theta wave and the alpha wave highly related to a degree ofengagement (i.e., concentration) may be extracted by sorting thebrainwave signal according to frequency. The second controller 400 mayperform the removal of the blinking eye component, the fast Fouriertransformation process, and the brainwave extracting process.

A degree of engagement by the subject with the content may be determinedto have increased when an amplitude magnitude of the frontal midlinetheta wave increases and the eye blinking per minute rate decreases.Therefore, the second controller 400 can determine the degree ofengagement by the subject with the content by monitoring changes of thefrontal midline theta wave, the alpha wave, and the eye blinking perminute rate.

FIG. 4 is a block diagram illustrating a bio signal detector 200 of thecontent evaluation system, according to exemplary embodiments of thedisclosed subject matter.

Referring to FIG. 4, the bio signal measured by the bio signal detector200 may include at least one of a Galvanic skin response, heart rate,body temperature, respiration, and facial electromyogram.

The bio signal detector 200 may include a Galvanic skin response sensor210 to measure the Galvanic skin response of the subject, a heart ratesensor 220 to measure a heart rate of the subject, a body temperaturesensor 230 to measure a body temperature of the subject, a respirationsensor 240 to measure a respiration of the subject, and a facialelectromyogram sensor 250 to measure a facial electromyogram.

The second controller 400 may determine the degree of engagement and anemotional reaction of the subject to the content through changes in thebio signals measured by the bio signal detector 200. For example, thesecond controller 400 may determine the degree of engagement of thesubject to the content through changes in the Galvanic skin response,the heart rate, the body temperature, and the respiration of thesubject, and may determine the emotional reaction, i.e., positiveemotion or negative emotion, of the subject to the content throughchanges in the facial electromyogram of the subject.

The degree of engagement of the subject to the content is determined asincreasing when the Galvanic skin response decreases, the heart rateincreases, the body temperature decreases, and the respirationdecreases.

The second controller 400 may therefore determine the degree ofengagement of the subject to the content based on changes in Galvanicskin response, changes in the heart rate, changes in the bodytemperature, changes in the respiration, changes in the frontal midlinetheta wave and the alpha wave, and changes of the eye blinking perminute rate. For example, as shown in Table 1, compared to a normal,baseline, or stable state, skin conductivity (Galvanic skin response)may be increased, body temperature may be decreased, heart rate may beincreased, breathing may be decreased, eye-blinking may be decreased,and the frontal midline theta wave may be increased to indicate that thesubject is engaged. Further, as shown in Table 1, compared to a normal,baseline, or stable state, skin conductivity (Galvanic skin response)may be decreased, body temperature may be increased, heart rate may bedecreased, breathing may be increased, eye-blinking may be maintained orunchanged, and the frontal midline theta wave may be maintained orunchanged to indicate that the subject is not engaged.

TABLE 1 Measured Bio Signal Changes Indicating Engagement Change withrespect to normal state of subject Measured Bio Signal Indicates EngagedIndicates not Engaged skin conductivity increased decreased bodytemperature decreased increased heart rate increased decreased breathingdecreased increased eye-blinking decreased maintained frontal midlinetheta wave increased maintained

FIG. 5 illustrates a Galvanic skin response sensor 210, a heart ratesensor 220, and a body temperature sensor 230 attached to fingers of asubject, according to exemplary embodiments of the disclosed subjectmatter.

Referring to FIG. 5, the Galvanic skin response sensor 210, the heartrate sensor 220, and the body temperature sensor 230 may be attached tofingers of the subject. In some cases, the Galvanic skin response sensor210, the heart rate sensor 220, and the body temperature sensor 230 maybe attached to a middle finger, index finger and ring finger, and alittle finger, respectively. Each of the sensors 210, 220, and 230 maymeasure a corresponding bio signal, as noted above.

In some cases, the Galvanic skin response sensor 210, the heart ratesensor 220, and the body temperature sensor 230 may be attached to bodyparts other than fingers. For example, when the subject is a gamerplaying a PC game content, the Galvanic skin response sensor 210, theheart rate sensor 220, and the body temperature sensor 230 can beattached to toes of the subject.

FIG. 6 is a drawing illustrating a respiration sensor of the bio signalunit attached to the subject, according to exemplary embodiments of thedisclosed subject matter.

Referring to FIG. 6, the respiration sensor 240 may be attached to thesubject's chest. However, the respiration sensor 240 may be attached toany other body part where respiration can be measured.

FIG. 7 illustrates locations of the facial electromyogram sensors on aface of the subject, according to exemplary embodiments of the disclosedsubject matter.

Referring to FIG. 7, the facial electromyogram sensor 250 can include atleast one measurement of Corrugator Supercilii, Orbicularis Oculi, andZygomaticus Major to detect a facial electromyogram.

The facial electromyogram sensor 250 may include a first facialelectromyogram sensor to monitor the Corrugator Supercilii, a secondfacial electromyogram sensor to monitor the Orbicularis Oculi, and athird facial electromyogram sensor to monitor the Zygomaticus Major.

The second controller 400 can determine an emotional reaction of thesubject to the content through changes in the facial electromyogram ofthe subject. For example, the second controller 400 may determine anegative emotional reaction through measurements of the CorrugatorSupercilii, and determine a positive emotional reaction throughmeasurements of the Orbicularis Oculi and Zygomaticus Major. Thepositive emotional reaction may be a positive element or factor inevaluating the content, and the negative emotional reaction may be anegative element or factor in evaluating the content. A weight of thefacial electromyogram may be given to each facial muscle measured toevaluate the emotional reaction more precisely.

Hereinafter, a method evaluating content using the content evaluationsystem is described.

FIG. 8 is a flow chart illustrating a content evaluation methodaccording to exemplary embodiments of the disclosed subject matter.

Referring to FIG. 8, a content evaluation method may include measuring abrainwave signal of a subject provided with the content using thebrainwave detector 100 S10; measuring bio signals of the subject usingthe bio signal detector 200 S20; and obtaining an image of the subjectthough the camera 500 S30. In some cases, S10, S20, and S30 may beperformed simultaneously, and, in some cases, they may be performed in adifferent order.

The brainwave signal measured by the brainwave detector 100 may includeat least one of a frontal midline theta wave or an alpha wave. An eyeblinking rate of the subject may be measured as part of the brainwavesignal. The bio signal measured by the bio signal detector 200 mayinclude at least one of a Galvanic skin response, a heart rate, a bodytemperature, a respiration, and a facial electromyogram. The facialelectromyogram may include at least one electromyogram measurement ofCorrugator Supercilii, Orbicularis Oculi, and Zygomaticus Major.

After measuring the brainwave signal S10 and the bio signal S20, thebrainwave signal may be analyzed S40 by the second controller 400 todetect changes in the brainwave before and while content is provided. Inaddition, the second controller 400 may analyze the bio signal to detectchanges of the bio signal before and while the content is provided S50.S40 and S50 may be performed independently or simultaneously.

In some cases, determining of the changes in the brainwave signal S40may be performed by an independent component analysis that removeseye-blink artifacts from the brainwave signal measurement result.

Subsequently, the second controller 400 may determine the subject'sengagement and emotional reaction to the content by using the changes inthe brainwave signal and the bio signal S60.

Changes in the brainwave signal may correspond to the degree ofengagement to the content. For example, the degree of engagement of thesubject to the content may be determined as increasing when an amplitudemagnitude of the frontal midline theta wave increases and the eyeblinking per minute rate decreases.

In addition, changes of the bio signal may affect the degree ofengagement and emotional reaction of the subject to the content. Forexample, the degree of engagement to the content may be determined fromchanges of the Galvanic skin response, the heart rate, the bodytemperature, and the respiration of the subject. The emotional reactionof the subject to the content may be determined from changes of thefacial electromyogram of the subject.

In some cases, the degree of engagement of the subject to the content isdetermined as increasing when the Galvanic skin response decreases, theheart rate increases, the body temperature decreases, and therespiration decreases. In some cases, the emotional reaction of thesubject to the content may be determined as a negative emotionalreaction through the measurement of Corrugator Supercilii, and apositive emotional reaction may be determined through the measurement ofOrbicularis Oculi and Zygomaticus Major.

Then, the second controller 400 may verify the determined result usingan image of the subject obtained by the camera 500. For example, thesecond controller 400 may evaluate the content after analyzing overallmovement of the subject from images provided by the camera 500 and maythen verify the determined results, i.e., degree of engagement andemotional reaction, using the analyzed results. For example, the imagesof the camera 500 may be synchronized with the bio signals and/orbrainwaves, and the images of the camera 500 may be filtered to removeundesired noise, such as, drowsiness, unconscious movements, reflexmovements, and the like of test subject, from the measured bio signalsand/or brainwaves. Therefore, a reliability of the evaluation of thecontent can be improved because errors can be removed, corrected, andcomplemented by verifying the determined results through a comparisonwith the overall movement of the subject.

After S70, the second controller 400 may evaluate the content S80 usingthe verified result. The step of evaluating the content may be performedaccording to an evaluation standard data provided by the evaluationstandard data storage 600. The evaluation standard data can be sortedand stored according to a type of the content or age or sex of thesubjects, and may be updated through analysis of accumulated evaluationdata.

The content evaluation result may be displayed on the display 700.

According to exemplary embodiments of the disclosed subject matter, morereliable box-office prediction can be achieved through contentevaluation using objective data such as brainwave, bio-signals andimages of the subject provided with a cultural content. The disclosedcontent evaluation system and method may allow content providers toimprove portions of their content that were not liked by subjects and tocorrect or modify these portions. For example, the portions of thecontents may be modified or corrected by replacing the portion, forexample a scene, a character, a scenario, music, story, or other portionof contents, having data associated therewith that is interpreted as thesubjects being not interested in or not engaged with that portion. Also,the content evaluation system and method can provided a quantitative andqualitative evaluation of contents to content providers to improve aquality of the content.

It will be apparent to those skilled in the art that variousmodifications and variations can be made in the present disclosurewithout departing from the spirit or scope of the disclosed subjectmatter. Thus, it is intended that the present disclosure cover themodifications and variations of the disclosed subject matter providedthey come within the scope of the appended claims and their equivalents.

What is claimed is:
 1. A media content evaluation system, comprising: abrainwave detector comprising a brainwave detector cap configured to beworn on a subject's head and to detect a brainwave signal at a firsttime and a second time; a bio signal detector comprising a facialelectromyogram sensor and at least one of a Galvanic skin responsesensor, a heart rate sensor, a body temperature, and a respirationsensor, and configured to detect a bio signal at the first time and thesecond time; a camera to obtain images at the first time and the secondtime; a media content device configured to expose media content to thesubject at the second time; a controller configured to: receive thebrainwave signal from the brainwave detector, the bio signal from thebio signal detector, and the image from the camera at the first time ofthe subject, receive the brainwave signal from the brainwave detector,the bio signal from the bio signal detector, and the image from thecamera at the second time of the subject, determine a change in thebrainwave signal and a change in the bio signal between the first andsecond times, determine a degree of engagement and an emotional reactionof the subject using the change of the brainwave signal and the changeof the bio signal, analyze a movement of the subject from the imagesreceived from the camera to provide analyzed results, verify thedetermined degree of engagement and the emotional reaction of thesubject using the analyzed results, including removing motion noise dueto drowsiness, unconscious movements, or reflect movements from thebrainwave signal and the bio signal, and evaluate the media contentexposed to the subject at the second time using at least one of thedegree of the engagement and the emotional reaction; and an evaluationstandard storage having stored thereon evaluation standard data toevaluate the media content, wherein the controller is further configuredto evaluate at least one of the degree of engagement and the emotionalreaction based on the evaluation standard data, and update theevaluation data stored in the evaluation standard storage based on theevaluation of the media content, and wherein the evaluation standarddata is sorted and stored according to a criteria comprising at leastone of type of the media content, age of the subject, and sex of thesubject.
 2. The media content evaluation system of claim 1, wherein thebrainwave comprises at least one of a frontal midline theta wave or analpha wave.
 3. The media content evaluation system of claim 2, whereinthe brainwave cap comprises an electrode configured to detect a blinkingeye.
 4. The media content evaluation system of claim 3, wherein thecontroller is configured to analyze the brainwave signal through anindependent component analysis that removes eye-blink artifacts from aresult associated with the detected brainwave signal.
 5. The mediacontent evaluation system of claim 3, wherein the controller isconfigured to determine that the degree of engagement is increasing inresponse to an increase in an amplitude magnitude of the frontal midlinetheta wave and a decrease in an eye blinking per minute rate.
 6. Themedia content evaluation system of claim 1, wherein the controller isconfigured to determine the degree of engagement through changes of theGalvanic skin response, the heart rate, the body temperature, and therespiration of the subject, and to determine the emotional reactionthrough a change of the facial electromyogram of the subject.
 7. Themedia content evaluation system of claim 6, wherein the facialelectromyogram comprises at least one measurement of electrical activityof a Corrugator Supercilii, Orbicularis Oculi, and Zygomaticus Major. 8.The media content evaluation system of claim 7, wherein the controlleris configured to determine a negative emotional reaction through ameasurement of the Corrugator Supercilii, and to determine a positiveemotional reaction through a measurement of the Orbicularis Oculi andthe Zygomaticus Major.
 9. The media content evaluation system of claim6, wherein the controller is configured to determine that the degree ofengagement is increasing in response to a decrease in Galvanic skinresponse, an increase in heart rate, a decrease in body temperature, anda decrease in respiration.
 10. The media content evaluation system ofclaim 1, wherein the controller is configured to amplify at least one ofthe brainwave signal and the bio signal.
 11. The media contentevaluation system of claim 1, wherein the controller is configured toadjust the evaluation standard data as a number of measurementsassociated with the content increases, and to store the adjustedevaluation standard data in the evaluation standard storage.
 12. Themedia content evaluation system of claim 1, further comprising a displayto display an evaluation result.